terraform-state-migration-makefile

## tf/mv-state -- Moves a given resource from one root module to another via `terraform state mv`.
## Example:
## DEST_DIR=monitor \
##		DEST_WORKSPACE=dev \
##		SRC_DIR=k8s \
##		SRC_WORKSPACE=dev \
##		RESOURCE=module.datadog_monitors \
##		make tf/mv-state;
tf/mv-state:
	cd ./components/terraform/$(DEST_DIR); \
		[[ "$(DEST_WORKSPACE)" != "default" ]] && terraform workspace select $(DEST_WORKSPACE); \
		terraform state pull > $(DEST_WORKSPACE)-`date +"%Y-%m-%d"`.tfstate; \
		cd ../$(SRC_DIR); \
		[[ "$(SRC_WORKSPACE)" != "default" ]] && terraform workspace select $(SRC_WORKSPACE); \
		terraform state mv -state-out=../$(DEST_DIR)/$(DEST_WORKSPACE)-`date +"%Y-%m-%d"`.tfstate $(RESOURCE) $(RESOURCE); \
		cd ../$(DEST_DIR); \
		terraform state push $(DEST_WORKSPACE)-`date +"%Y-%m-%d"`.tfstate;